<template>
  <div>
       <!-- 面包屑导航 -->
          <el-breadcrumb separator-class="el-icon-arrow-right">
            <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
            <el-breadcrumb-item>商品管理</el-breadcrumb-item>
            <el-breadcrumb-item>商品分类</el-breadcrumb-item>
            <el-breadcrumb-item>添加商品</el-breadcrumb-item>
          </el-breadcrumb>

          <!-- 卡片视图 -->
          <el-card>
            <!-- 提示框 -->
             <el-alert  title="添加商品信息"  type="info"  center show-icon :closable="false"></el-alert>
            <!-- 步骤条 -->
            <el-steps :space="200" :active="activeIndex-0" finish-status="success" align-center>
                <el-step title="基本信息"></el-step>
                <el-step title="商品参数"></el-step>
                <el-step title="商品属性"></el-step>
                <el-step title="商品图片"></el-step>
                <el-step title="商品内容"></el-step>
                <el-step title="完成"></el-step>
            </el-steps>

            <!-- tabs标签页  :before-leave="beforeTabLeave" 标签页即将触发切换之间触发的钩子  @tab-click当标签被选中时触发-->
            <el-form :model="addForm" :rules="addFormRules" ref="addFormRef" label-width="100px" label-position="top" >
              <el-tabs :tab-position="tabPosition"  v-model="activeIndex" :before-leave="beforeTabLeave"  @tab-click="tabClicked">
<!-- ------------------------------------------------------------------------------ -->
                  <el-tab-pane label="基本信息" name="0">
                    
                    <el-form-item label="商品名称" prop="goods_name">
                        <el-input v-model="addForm.goods_name"></el-input>
                    </el-form-item>

                     <el-form-item label="商品价格" prop="goods_price">
                        <el-input v-model="addForm.goods_price" type="number"></el-input>
                    </el-form-item>

                     <el-form-item label="商品重量" prop="goods_weight">
                        <el-input v-model="addForm.goods_weight" type="number"></el-input>
                    </el-form-item>

                     <el-form-item label="商品数量" prop="goods_number">
                        <el-input v-model="addForm.goods_number" type="number"></el-input>
                    </el-form-item>

                    <el-form-item label="商品分类" prop="goods_cat">
                      <!-- 级联选择器 -->
                         <el-cascader
                         expand-trigger="hover"
                          v-model="addForm.goods_cat"
                          :props="cateProps"
                          :options="catelist"
                          @change="handleChange"></el-cascader>
                    </el-form-item>
                  </el-tab-pane>
<!-- ------------------------------------------------------------------------------ -->
                  <el-tab-pane label="商品参数" name="1">
                    <!-- 渲染表单的item项 -->
                    <el-form-item :label="item.attr_name" v-for="item in manyTableData" :key="item.attr_id">
                      <!-- 多选框组 -->
                      <el-checkbox-group v-model="item.attr_vals" >
                        <el-checkbox :label="cb" v-for="(cb,i) in item.attr_vals" :key="i" border></el-checkbox>
                      </el-checkbox-group>
                    </el-form-item>
                  </el-tab-pane>
<!-- ------------------------------------------------------------------------------ -->
                  <el-tab-pane label="商品属性" name="2">
                      <el-form-item :label="item.attr_name" v-for="item in onlyTableData" :key="item.attr_id">
                          <el-input v-model="item.attr_vals"></el-input>
                      </el-form-item>
                  </el-tab-pane>
<!-- ------------------------------------------------------------------------------ -->
                  <el-tab-pane label="商品图片" name="3">
                    <!--action表示图片要上传到的后台地址  on-success监听图片上传的事件-->
                    <el-upload
                      class="upload-demo"
                      :action="uploadURL"
                      :on-preview="handlePreview"
                      :on-remove="handleRemove"
                      list-type="picture"
                      :headers="headerobj"
                      :on-success="handlesuccess"
                      >
                      <el-button size="small" type="primary">点击上传</el-button>
                    </el-upload>
                  </el-tab-pane>
<!-- ------------------------------------------------------------------------------ -->

                  <el-tab-pane label="商品内容" name="4">
                    <!-- 富文本编辑器 -->
                    <quill-editor v-model="addForm.goods_introduce" :disabled="false" >
                    </quill-editor>
                      <!-- 添加商品的按钮 -->
                      <el-button type="primary" class="butadd" @click="add">添加商品</el-button>
                  </el-tab-pane>
              </el-tabs>
            </el-form>
          </el-card>


          <!-- 图片预览 -->
          <el-dialog
            title="图片预览"
            :visible.sync="previewVisible"
            width="50%"

          >
          <img :src="previewPath" alt="" class="previewImg">
          </el-dialog>
  </div>
</template>

<script>
import _ from 'lodash'
export default {
    name:'myAdd',
    data(){
        return {
            // 步骤条进度
            activeIndex:'0',
            // 控制标签页的方向
            tabPosition:'left',
            // 添加商品的数据对象
            addForm:{
               goods_name:'',
               goods_price:0,
               goods_weight:0,
               goods_number:0,
              //  商品所属的分类数组
               goods_cat:[],
              //  图片的数组
               pics:[],
              //  商品的详情描述
               goods_introduce:'',
               attrs:[]
            },
            // 添加商品验证规则
            addFormRules:{
              // 商品名称 
              goods_name:[
                {required:true,message:'请您输入商品名',trigger:'blur'}
              ],
              // 商品价格
              goods_price:[
                {required:true,message:'请您输入该商品的价格',trigger:'blur'}
              ],
              // 商品重量
              goods_weight:[
                {required:true,message:'请您输入该商品的重量',trigger:'blur'}
              ],
              // 商品数量
              goods_number:[
                {required:true,message:'请您输入该商品的数量',trigger:'blur'}
              ],
              // 商品分类
               goods_cat:[
                {required:true,message:'请选择该商品的分类',trigger:'blur'}
               ]
            },
            // 级联选择器数据
            catelist:[],
            // 级联选择器配置对象
            cateProps:{
              label:'cat_name',
              value:'cat_id',
              children:'children'
            },
            // 保存商品参数的动态参数列表数据
            manyTableData:[],
            // 保存商品属性的静态属性列表数据
            onlyTableData:[],
            uploadURL:'http://127.0.0.1:8888/api/private/v1/upload',
            // 图片上传组建的headers请求头对象
            headerobj:{
               Authorization:window.sessionStorage.getItem('token')
            },
            previewPath:'',
            // 默认关闭预览托图片对话框
            previewVisible:false

        }
    },
    created(){
      this.getCateList()
    },
    methods:{
      async getCateList(){
        const {data:res} = await this.$axios.get('categories')
        if(res.meta.status !== 200) return this.$message.error('请求失败！！')
      this.catelist=res.data
        // console.log(this.catelist);
      },
      // 级联选择器选中项变化会触发
      handleChange(){
        console.log(this.addForm.goods_cat);
        // 判断用户选择的是三级分类 如果不是就清空数组
        if(this.addForm.goods_cat.length !== 3){
          this.addForm.goods_cat=[]
        }
      },
      // 
      beforeTabLeave(activeName,oldActiveNa){
        // console.log('即将进入的名字是'+activeName);
        // console.log('即将离开的名字是'+oldActiveName);

        if(oldActiveNa==='0' && this.addForm.goods_cat.length !== 3){
          this.$message.error('您没有完成基本信息商品分类的填写！！！') 
          return false 
        } 
      },
      async tabClicked(){
        console.log(this.activeIndex);
          if(this.activeIndex ==='1'){
           const {data:res} = await this.$axios.get(`categories/${this.cateID}/attributes`,{params:{sel:'many'}})
           if(res.meta.status !== 200) return this.$message.error('获取动态参数失败！！')

          res.data.forEach(item=>{
             item.attr_vals = item.attr_vals.length===0 ? [] : item.attr_vals.split(' ')
          })

          this.manyTableData=res.data
          // console.log(this.manyTableData);
          }else if(this.activeIndex ==='2'){
             const {data:res} = await this.$axios.get(`categories/${this.cateID}/attributes`,{params:{sel:'only'}})
             if(res.meta.status !== 200) return this.$message.error('获取静态属性失败！！')
             console.log(res);
             this.onlyTableData = res.data
          } 
      },
      //处理图片预览效果
      handlePreview(file){
        console.log(file);
        this.previewPath=file.response.data.url
        this.previewVisible=true  
      },
      // 处理移出图片的操作
      handleRemove(file){
        // file将要被移出的图片 
          console.log(file);
          // 获取将要删除的图片的临时路径
          const filePath=file.response.data.tmp_path
          // 从pics数组中找到这个图片对应的索引值
          const i = this.addForm.pics.findIndex(x=>x.pic=filePath)
          this.addForm.pics.splice(i,1)
      },
      // 监听图片上传成功的事件
      handlesuccess(re){
        // console.log(re);
        if(re.meta.status !== 200) return this.$message.error('图片上传失败！')
        const picsInfo={pic:re.data.tmp_path}
        this.addForm.pics.push(picsInfo)
        // console.log(this.addForm.pics);
      },
      // 添加商品按钮
      add(){
        const that = this;
        // console.log(this.manyTableData);
        // 对表单进行预验证
        this.$refs.addFormRef.validate(async vali=>{
          if(!vali) return this.$message.error('您没有填写正确的表番数据')
          // 调用lodash进行深拷贝
          const form=_.cloneDeep(this.addForm)
          // 进行赋值操作
          form.goods_cat=this.addForm.goods_cat.join(',')
      
          // 处理动态参数
          that.manyTableData.forEach(item=>{

            const newInfo={
              attr_id:item.attr_id,
              attr_value:item.attr_vals.join(' ')
              }
            this.addForm.attrs.push(newInfo)
          })
          // 处理静态属性
          that.onlyTableData.forEach(item=>{
            const newInfo={
              attr_id:item.attr_id,
              attr_value:item.attr_vals
              }
            this.addForm.attrs.push(newInfo)
          })
          // 进行赋值操作
          form.attrs=this.addForm.attrs
          console.log(form);

          // 添加商品 商品的名称必须是唯一的
        const {data:res} = await this.$axios.post('goods',form)
        console.log(res);
        if(res.meta.status !== 201) return this.$message.error('添加商品失败！！！')

        // 通过编程式导航跳转到商品列表页面
        this.$router.push('/goods')
        })
      }

    },
    computed:{
      // 获取三级分类的id
      cateID(){
        if(this.addForm.goods_cat.length === 3){
          return this.addForm.goods_cat[2]
        }
        return null
      }
    }
}
</script>

<style scoped>
.el-step__title{
    font-size: 13px;

}
.el-checkbox{
  margin: 0 5px 5px 0 !important;
}
.previewImg{
  width: 100%;
}
.butadd{
  margin-top: 15px;
}
</style>